從AsyncTask中擷取資料的問題

標籤：

public class GetData extends AsyncTask<String, Void, String> {     DataDownloadListener dataDownloadListener;     public GetData()     {     }     public void setDataDownloadListener(DataDownloadListener dataDownloadListener) {         this.dataDownloadListener = dataDownloadListener;     }     @Override     protected Object doInBackground(Object... param)      {         return null;     }     @Override     protected void onPostExecute(Object results)     {                if(results != null)         {                        dataDownloadListener.dataDownloadedSuccessfully(results);         }         else         dataDownloadListener.dataDownloadFailed();     }     public static interface DataDownloadListener {         void dataDownloadedSuccessfully(Object data);         void dataDownloadFailed();     } }
在Activity中使用：

GetData getdata = new GetData(); getdata.setDataDownloadListener(new DataDownloadListener() {     @SuppressWarnings("unchecked")     @Override     public void dataDownloadedSuccessfully(Object data) {     }     @Override     public void dataDownloadFailed() {     } }); getdata.execute(""); 

從AsyncTask中擷取資料的問題